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Warning – Rockwell Automation 140U Q and M-Frame Circuit Breakers Instruction Leaflet for Shunt Trip User Manual

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WARNING

IF ENERGY

IS

APPLIED TO SHUNT TRIP LEADS, DO

NOT ATTEMPT TO RESET AND CLOSE THE CIRCUIT
BREAKER. ATTEMPTING TO CLOSE THE CIRCUIT
BREAKER WHILE ENERGIZED WILL RESULT IN A
"SHOCKOUT" CONDITION.

Table

lists application and electrical operating rating

data for the shunt trip.

For this publication, the term circuit breaker shall also
include molded case switch and motor circuit protector.

Depending on the model ordered, connections for the
shunt trip are in one of four forms. The standard wiring
configuration is pigtail leads exiting the rear of the base

directly behind the shunt trip. Optional configurations

include a terminal block mounted on the same side of the
base as the accessory, leads exiting the side of the base

where the accessory is mounted, and leads exiting the

rear of the base on the side opposite the accessory. The
18-inch long pigtail leads are color coded for identifica-

tion; identification labels are provided for pigtail leads and
terminal block points. For allowable locations of all acces-
sories, refer to Selection Guide.

Note: When the walking beam interlock is used with

the circuit breaker, the rear trough cannot be used for
accessory pigtail leads.

This instruction leaflet

gives detailed procedures for

installing the shunt trip.

2. INSTALLATION

Note: The shunt trip can be field-installed in Q and
M Frame circuit breakers.

Before attempting to install the shunt

trip,

check that

catalog number is correct as ordered and that the

rating of the accessory satisfies job requirements.

The shunt trip, shown in kit form in Fig. 2-1, is installed in

right or left accessory mounting cavity

of

a

2-,

3-, or

4-pole circuit breaker with a

fixed thermal or

adjustable thermal trip unit; and, in the left pole only of a

circuit breaker with an electronic trip unit. A shunt

must be installed in the circuit breaker before the cir-

cuit breaker is mounted in an electrical system.

To install

the shunt trip, perform the following procedures:

Note: A circuit breaker that is mounted in an electri-

system must be removed to install the accessory.

To ensure correct accessory installation, the circuit

breaker must be placed on a horizontal surface.

WARNING

VOLTAGES IN ENERGIZED EQUIPMENT CAN

CAUSE DEATH OR SEVERE PERSONAL INJURY.
BEFORE REMOVING A CIRCUIT BREAKER
INSTALLED IN AN ELECTRICAL SYSTEM, MAKE

THE CIRCUIT BREAKER IS SWITCHED TO THE

OFF

POSITION AND THERE

IS

NO VOLTAGE

PRESENT WHERE WORK IS TO BE PERFORMED.
SPECIAL ATTENTION SHOULD BE PAID TO
REVERSE FEED APPLICATIONS TO ENSURE NO

VOLTAGE IS PRESENT.

Note: For new circuit breaker installation, the trip unit
must be installed in circuit breaker before attempting
to install

a

shunt trip.

Switch circuit breaker to OFF position.

Disconnect and remove circuit breaker from instal-
lation and terminal connections.

Remove cover screws and covers

Note: For a shunt trip having rear or opposite-side

exiting pigtail leads, thread leads through center
trough

in

side of base before attempting to insert the

mounting bracket. Pigtail leads exiting in this manner

be eased through trough as mounting bracket

is inserted into trip unit retaining slots. Use center

trough also for leads exiting the side of the circuit

b

ke r.

Route wiring to meet installation requirements.

(See Fig.

40752-075(1)

Effective 4/02

Where local codes and standards permit and UL list-
ing is not required, internal accessories can be field
installed in sealed circuit breakers. In this case, UL
listing becomes invalid and the label should be

removed.